I agree that a DEFSYSTEM facility is useful. However, what its specs
should be are unclear. We just built an experimental system** using
objects that also supports incremental changes as well as version
control. Should facilities like these be included? It seems that we
are far from having a good handle on what is needed. This is to support
Dan Weinreb's contention that the system construction tool business is
still very volatile.
(** A copy of a short paper on defintion groups is available on
request. Send Snail-mail address.)